Weighing-scale.



No. 881,020. PATENTED MAR, a, 1908.

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WEIGHING SCALE-y -APPLIOATION PILBDIEB. 28,1906. RENEWED OUT. 6, 1907.

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CLARENCE W. MoKEE, or PHOENIX, ARIZONA 'rnnnironv.

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Specification of Letters Patent.

Patented March 3, 1908.

Application filed February 28, 1906, Serial in). 303,521, Renewed October 5, 1907. Serial No. 396,657.

To all whom it mag/concern:

Be it known that'l, CLARENCE W. Molina,

a citizen of the United States, residing at Phoenix, in the countyof \laricopa and Territory of Arizona, have invented new anduseful Improvements in eighingbcales, of which the following is a specification.

This invention relates to weighing scales and is an improvement on the Weighing scales described in United States Letters Patent Nos. 762,187, issued June 7, 190a, and 793,537, issued June 27, 19%.

The ob'ect of the invention is in a ready, simple, thoroughly efiicient and practical manner and by audible means to notify a purchaser when correct weighthas been given and to prevent over-Weighing with consequent lossto the seller; and further more to obviate friction between the operative parts of the mechanism, thereby pre venting anv interference with the correct operation of the scales.

With the above and other objects in view which'will appear as the nature of the invention is better understood, the invention consists, generally stated, in a signaling device i forwelghlng scales embodying in its con struction'a contact movable with a pan support, and a make-andbreak device supportedby a fixed part below the body of the scale, comprising a cup or holder to contain a body of mercury or other suitable liquid to be engaged by the contact when the pan support descends, the said contact and iner- -cury holder being in circuit with a source of electrical energy, including a hell or other means for giving an audible signal.

The invention consists, further, in the novel construction, combination and ar rangement of parts of a signaling device for scales as will be hereinafter more fully de scribed and claimed.

' In the accompanying drawings forming part of this specification, and in which like characters 'of reference indicate corresponding parts, there is illustrated a form of embodiment of the invention, as shown in Figure 1, capable of carrying the same into practical operation, and in Fig.2 is shown'a slightly modified form of the invention.

It is to be understood that the elements herein exhibited may be varied or changed as found desirable, as come properly within the scope of the claims hereunto appended,

Without departing from the spirit of the invention witl'iout departing from the spirit of the ii'ivcntion.

The scale is herein shown as resting upon a counter B, the same not forming any part of the invention, but merely shown to "facilitate the iu'iderstanding thereof, as the device can be sold as an article of manufacture and attached to any ordinary form of support. The signaling device is placed beneath the counter B to. prevent it from being tampered With by unauthorized persons. The pan support 3; of the scale has an extension 2 which is adapted to be engaged by a rod or plunger 3, said rod having engagement with the extension 2 by means of a flexible oint a and being adapted to move through an opening 5 in the counter B. At a suitable point under the countenB and the scale A is fixed a holder or cup 6 containing a body of mercury 7, or other suitable liquid, the level oi which in the cup will be sulliciently removed irom the upper end thereof to permit the said rod or plunger 3 to move the proper distance downward before emerging in or contacting with said body of mercury 7 to insure down Weight; but in the event of overweight the said rod or plunger 3 will be forced into the body of mercury 7, or other suitable liquid, and by remaining therein cause a continuous sounding of the alarm or signal until the overweight has been removed.

Connected to the cup or holder 6 and plunger or rod 3, at anydesired locality, are conductors 8 and 9 respectively constituting a circuit in which is included an ordinary elec tric bell 10, the terminals of the circuit bein connected with a suitable source of electrica energy, such as a plurality of dry cells 11, 11, as clearly shown. It will be apparent that when the scales are in operation after a correct amount of material has been placed on the pan support 1, said pan support will ,be caused to move downward a distance without forcing the rod or plunger 3 into the body of mercury 7, orother suitable liquid, and

log coml'iincd lllfflOWlbl'l the improvements,"

should it be that a surplus amount of mate rial is added, the said an support 1 will have a further downward movement, thereby bringing the free end of the rod or plunger 3 into the body of mercury 7, or other suitable liquid, thus making a contact and completing the circuit; and until the surplus amount of material is removed from the an support 1 a continuous sounding of the a arm or signal will be audible.

In Fig. 2 l have shown a modified construe tion, which discloses a spring contact member 12 suitably fixed in a position below the counter B for engagement with the rod or lunger 3 and when so engagedcapable of forming a complete circuit and having the same function as the device employed in Fig. 1.

The devices of this invention are exceedingly simple in construction and will be.

found thoroughly eflicient and durable for the purpbse designed, and Will not be liable to damage or derangement in use. If, however, the parts should become disconnected they are easily accessible and can be rendered operative by replacement.

It will be ap arent that I may substitute a visible signa as' at 13 in Fig. 2 for the audible signal if found desirable.

Having thus described the invention, what I claim is In a weighing scale having a movable pan support provided with a depending extenslon, a plunger loosely mounted on the latter and having a contact terminal, the latter projecting below the base of the scale, a yieldable element independent of the scale and arranged within the path of the contact terminal and normallv out of contact therewith andadapted to be engaged thereby for completing'an electrical circuit, anelectric circuit, and a signaling device arranged with in the circuit said yieldable element being below the plane of the scale base.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

' CLARENCE W. MCKEE. Witnesses:

C. E. MCKEE, BEATRICE W1LLIscnoF'r. 

